<template>
  <div class="todo-header">
    <input
      type="text"
      placeholder="请输入你的任务名称，按回车键确认"
      @keyup.enter="handle"
      v-model.trim="todoName"
    />
  </div>
</template>

<script>
export default {
  props: ['addTodo'],
  data() {
    return {
      todoName: '',
    }
  },
  methods: {
    handle() {
      // 1. 获取用户输入(利用v-model实现双向数据绑定)
      // 2. 将数据传递给App组件
      // 判断todoName是否为空,为空则不传递todoName
      if (!this.todoName) return
      this.addTodo(this.todoName)
      // 3. 清空文本框
      this.todoName = ''
    },
  },
}
</script>

<style scoped>
/*header*/
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075),
    0 0 8px rgba(82, 168, 236, 0.6);
}
</style>
